Where are IR LEDs used?

It&#;s true that LEDs can help illuminate your life in all kinds of ways. You can use them to light your home, your garden, your pool; they&#;re used in cars, on planes, streetlamps and in almost every civic application you can think of. But LEDs can also emit light waves that are invisible to the human eye: infrared waves. Infrared (IR) LEDs are most often the types of lights used in remote control devices and in security systems across the globe, including covert devices used by the US Military.

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Infrared LEDs are typically used in security cameras, to allow cameras to capture both day and nighttime images. Infrared light waves are invisible to the human eye, but are emitted by anything that gives off heat, such as a human body or a still-warm car engine. As opposed to night vision goggles, which simply detect infrared light, Infrared cameras both detect and emit infrared light according to the ambient light available. Infrared cameras usually have a sensor system that can monitor the light level in the recorded area. As the natural light level drops, the sensor will calculate how much infrared light is needed to illuminate the picture, and infrared LEDs will turn on accordingly. The power of the IR LED strips will increase gradually until it is fully dark out, at which point the image will be viewed in 100 percent IR light. The only drawback to IR technology is that images shot in IR can only be viewed in black and white.

Infrared LEDs are also used in most remote-control devices; an infrared beam carrying instructions in binary code is sent from the remote control to the device (your television or your child&#;s Tonka truck), which receives these commands and performs the action given.

What is infra-red (IR) light?

Infra-red (IR) light is a type of electromagnetic radiation which is invisible to us but can be felt as heat on the skin. It sits right next to the visible light spectrum:

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What is IR light used for?

1. Gesture recognition &#; for example games consoles like the X-Box One Kinect Motion Sensor
2. Surveillance &#; ANPR (automatic number plate recognition), CCTV (closed circuit television)
3. Machine vision and safety &#; for example, safety light curtains, automatic inspection, measurement etc.
4. Home interior &#; 3D remote control, IR video/audio communication
5. Home exterior &#; CCTV, door control, Pinoir
6. Biometrics &#; Iris, fingerprint and face recognition &#; the finger/eye/face is illuminated with IR light and the camera on the device takes a picture of the iris/features so that its characteristic features which are unique to every individual can be identifiedAutomotive &#; driver monitoring, occupancy detection, crash/pedestrian sensors, parking sensors, night vision
7. Traffic Control
8. Touch Screens
9. Health Monitoring - for example  Apple Watch and Osram BioMon

ILS have made it easy for customers to integrate infra-red LEDs by putting a varied number and range of Osram IR LEDs onto PCBs. These and accessories are available to purchase through RS Components

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